FreeBusy Unavailable for Some Users Exchange Outlook 2007

[polycarp]

#143038

I started receiving complaints last week from some users in one of my AD sites (site 2) that the free/busy information is sometimes or always unavailable. I’ve read a ton of posts and technet articles about this but nothing seems to match my specific environment. Either that or I’m just overlooking something.



Outlook logging isn’t revealing any errors nor is the Test E-mail AutoConfiguration utility.

Can somebody please help me?

My Exchange environment is as follows:

Site 1) CCR cluster on Win2k3
2 Win2k3 servers with both CAS and Hub roles installed (cas1 and cas2)
– behind a hardware load balancer/SSL accelerator hosting wildcard cert (*.company1.com) issued from public CA
DC/DNS server for company1.local – we are in a domain tree of a forest company2.com
users (with no complaints)

Site 2)) DC/DNS server for company1.local – we are in a domain tree of a forest (company2.com)
users (with free/busy problems)

Exchange Settings on both CAS servers:
Autodiscover URL is https://mail.company1.com/autodiscover/autodiscover.xml

Get-WebServicesVirtualDirectory -Server CAS1 | fl
InternalNLBBypassUrl : https://mail.company1.com/ews/exchange.asmx
Name : EWS (Default Web Site)
InternalAuthenticationMethods : {Ntlm, WindowsIntegrated}
ExternalAuthenticationMethods : {Ntlm, WindowsIntegrated}
BasicAuthentication : False
DigestAuthentication : False
WindowsAuthentication : True
Server : CAS1
InternalUrl : https://mail.company1.com/ews/exchange.asmx
ExternalUrl : https://mail.company1.com/ews/exchange.asmx

Get-AutodiscoveryVirtualDirectory -Server CAS1 | fl
Name : Autodiscover (Default Web Site)
InternalAuthenticationMethods : {Basic, Ntlm, WindowsIntegrated}
ExternalAuthenticationMethods : {Basic, Ntlm, WindowsIntegrated}
BasicAuthentication : True
DigestAuthentication : False
WindowsAuthentication : True
Server : CAS1
InternalUrl :
ExternalUrl :


Here is the output of “Test-OutlookWebServices -id alias | fl” on CAS1
Id : 1003
Type : Information
Message : About to test AutoDiscover with the e-mail address alias@company1.com.

Id : 1006
Type : Information
Message : The Autodiscover service was contacted at https://mail.company1.com/autodiscover/autodiscover.xml.

WARNING: An unexpected error has occurred and debug information is being generated: Object reference not set to an
instance of an object.
Test-OutlookWebServices : Object reference not set to an instance of an object.
At line:1 char:24
+ Test-OutlookWebServices < <<< -id alias | fl


Here is the output of “Test-OutlookWebServices -id alias | fl” on CAS2
Id : 1003
Type : Information
Message : About to test AutoDiscover with the e-mail address alias@company1.com.

Id : 1013
Type : Error
Message : When contacting https://mail.company1.com/autodiscover/autodiscover.xml received the error The remote server returned an error: (401) Unauthorized.

Id : 1006
Type : Error
Message : The Autodiscover service could not be contacted.

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